I just purched the DT25 to go along with my HD500 and i am experiencing no USB audio when the L6 Link is used. That is computer sounds over USb are not heard through the DT25 when the L6 Link is used. When I disconnect the L6 Link and pass audio from the 1/4" out to the DT25's input, I can hear computer audio (itunes playing etc.). Windows 7 Audio is setup correctly - my default audit device is the POD HD500 etc.
Is ther a setting on the POD in the L6 link i am missing.
I am using a mogami ALRF - XLRM mic cable for the L6 link. I have been reading that a DMX XLR cable should be used, but I don't think that is the problem since I have no trouble wiht my guitar and no trouble controlling the amp through Edit.
I am also able to record my guitar in reaper when the L6 Link is used.
i'm pretty sure that it states in the manual that you cant use USB + L6Link...
been a while since i looked though... if i remember correctly its like one small line of text... so easy to miss.
maybe things have changed though...